Unionized container truck drivers set up picket lines at Canada's largest port on Monday, joining hundreds of non-unionized workers who walked off the job last month in a dispute over pay and services. They will now join a nearly two-week long strike by non-unionized drivers, which has already crippled operations at the busy port, hitting the export of commodities like lumber and specialized grain products, and the import of consumer goods. "The impact of truckers walking off the job is in the order of about C$885 million ($796.9 million) per week…